// TODO: Make this use same buffer and event as RpcLogWriter.
public void OnNext(ApplyCommandRequested data, long sequence, bool endOfBatch)
{
var appliedDifference = data.LogIdx - _node.Data.LastApplied;
var logsToApply = EnumerableUtilities.Range(_node.Data.LastApplied + 1, (int)appliedDifference);
foreach (var logIdx in logsToApply)
{
var command = _commandRegister.Get(_node.Data.CurrentTerm, logIdx);
// The term may have been increased before the command was applied. In which case, rely on log matching to fix.
if (command == null)
{
continue;
}
command.Execute(_serviceLocator);
_nodePublisher.PublishEvent(new NodeCommandScheduled
{
Command = new ApplyEntry
{
EntryIdx = logIdx
}
}).Wait();
}
}
public void DoesNotRemoveCommandsForTermsMatchingNewTermWhenTermChanges()
{
// Arrange
const long term = 2L;
const long logIdx = 3L;
var command = new TestCommand();
var commandRegister = new CommandRegister();
commandRegister.Add(term, logIdx, command);
commandRegister.Get(term, logIdx).Should().Be(command);
// Act
commandRegister.Handle(new TermChanged(term));
// Assert
commandRegister.Get(term, logIdx).Should().Be(command);
}
public void RemovesCommandsForOlderTermsWhenTermChanges()
{
// Arrange
const long term = 1L;
const long logIdx = 3L;
var command = new TestCommand();
var commandRegister = new CommandRegister();
commandRegister.Add(term, logIdx, command);
commandRegister.Get(term, logIdx).Should().Be(command);
// Act
commandRegister.Handle(new TermChanged(term + 1));
// Assert
commandRegister.Get(term, logIdx).Should().BeNull();
}